Signal Transduction with Differential Pulse Width Modulation

1970 ◽  
Vol IECI-17 (2) ◽  
pp. 39-43 ◽  
Author(s):  
S.Y. Lee ◽  
Y.T. Li ◽  
H.L. Pastan
Keyword(s):  
Signal Transduction ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Differential Pulse

Investigation on positioning control strategy and switching optimization of an equal coded digital valve system

2019 ◽  
Vol 234 (8) ◽  
pp. 959-972
Author(s):  
Qiang Gao ◽  
Matti Linjama ◽  
Miika Paloniitty ◽  
Yuchuan Zhu
Keyword(s):  
Cost Function ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Differential Pulse ◽  
Pulse Number ◽  
Equal Distribution ◽  
Positioning Control ◽  
Valve System ◽  
Circular Buffer ◽  
Switching Method

This article concerns high accuracy positioning control with switching optimization for an equal coded digital valve system. Typically, pulse number modulation control cannot realize micro-positioning due to the characteristics of step-wise flow variation, therefore, a new position controller consisting of a model-based pulse number modulation and a differential pulse width modulation strategy is proposed to control the position of a hydraulic cylinder at high and low velocity cases, respectively. In addition, in order to solve several problems caused by the pulse number modulation and differential pulse width modulation, such as increased number of switchings and large difference among number of switchings of valves, a switching optimization consisting of a switching cost function, a circular buffer and a circular switching method is proposed. An adaptive weight of the switching cost function is proposed for the first time to reduce the total number of switchings under different pressure differences and its design criterion is presented. A circular buffer and a new circular switching method are used to improve the degree of equal distribution of switchings when the pulse number modulation and differential pulse width modulation are used, respectively. Comparative experimental results indicated that the average and the minimum positioning error for the proposed controller are only 10 and 1 μm, respectively. The number of switchings and the degree of equal distribution of switchings are significantly optimized. Moreover, the pressure fluctuations caused by the proposed controller remain acceptable.

scholarly journals Digital Control of Electrohydraulic Servosystem by Differential-Pulse Width Modulation.

1991 ◽  
Vol 57 (537) ◽  
pp. 1596-1603 ◽  
Author(s):  
Yoshikazu SUEMATSU ◽  
Hironao YAMADA ◽  
Tetuya TUKAMOTO ◽  
Takayoshi MUTO
Keyword(s):  
Digital Control ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Differential Pulse

scholarly journals Digital Cotrol of Hydrulic Rotary Actuator System by the Method of Differential-Pulse Width Modulation.

1992 ◽  
Vol 23 (7) ◽  
pp. 839-846
Author(s):  
Takayoshi MUTO ◽  
Hiroki KATO ◽  
Kimihiro OHNO ◽  
Hironao YAMADA ◽  
Yoshikazu SUEMATSU
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Differential Pulse ◽  
Rotary Actuator ◽  
Actuator System

The 1-Bit Instrument

2020 ◽  
Vol 1 (1) ◽  
pp. 44-74
Author(s):  
Blake Troise
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Interleaving Techniques ◽  
Sonic Environment

The 1-bit sonic environment (perhaps most famously musically employed on the ZX Spectrum) is defined by extreme limitation. Yet, belying these restrictions, there is a surprisingly expressive instrumental versatility. This article explores the theory behind the primary, idiosyncratically 1-bit techniques available to the composer-programmer, those that are essential when designing “instruments” in 1-bit environments. These techniques include pulse width modulation for timbral manipulation and means of generating virtual polyphony in software, such as the pin pulse and pulse interleaving techniques. These methodologies are considered in respect to their compositional implications and instrumental applications.

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